| 摘要 |
<p>A radial tyre having improved running stability as well as excellent ride comfort and rolling resistance comprising a tread, a sidewall and a bead, said sidewall being obtained from a rubber composition comprising: (i) a rubber component consisting of 40 to 70 parts by weight of a butadiene rubber and 30 to 60 parts by weight of a natural rubber and/or an isoprene rubber, and (ii) 10 to 30 parts by weight of a short fibre and not more than 30 parts by weight of a carbon black based on 100 parts by weight of the rubber component. Not less than 90% of the short fibre is oriented at an angle of +/-20 DEG to a circumferential direction of the tyre, and the thickness of the sidewall is not more than 6mm. Further, the ratio E*a/E*b of the complex elastic modulus E*a at the direction of orientation to a complex elastic modulus E*b at a direction perpendicular to the orientation direction is not less than 3.</p> |
